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【填空题】
2.It is the nature of the wise _________ pleasures, but the foolish to be a slave to them.
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答案
to resist
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不是钢轨的主要功用的为___
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【多选题】
25m,60kg/m钢轨普通线路,10.9级螺栓扭力矩应达到___。
A. 600N•m
B. 700N•m
C. 800N•m
D. 900N•m
【多选题】
不同类型的钢轨互相联结时,应使用___。
A. 鱼尾型夹板
B. 平直夹板
C. 双头式夹板
D. 异型夹板
【多选题】
下列设备零件中,___尺寸对最大轨缝限制值(即构造轨缝)没有影响。
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C. 接头螺栓
D. 轨枕扣件
【多选题】
线路上的伤损钢轨应用白铅油做好标记,连续轻伤有发展的标记是___。
A. ▕←△→▏
B. ▕←△△→▏
C. ↑△
D. ↑△△
【多选题】
线路上的伤损钢轨应用白铅油做好标记,___的标记是↑△△△。
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【多选题】
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【多选题】
个别更换夹板后放行列车___。
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B. 限速5km/h
C. 限速25km/h
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【多选题】
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道岔护轨轮缘槽标准宽度为42mm,容许误差为___。
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【多选题】
为平衡列车在曲线运行时产生的___,需要在曲线段将外轨抬高,使车体内倾。
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【多选题】
不会引起线路爬行的为___。
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线路轨距超限或变化率不合要求,以及拨道后有个别碎弯,应进行___作业。
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使用新枕木要钻道钉孔,孔深有垫板时为___。
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轨距尺由计量部门负责检定,周期为___。
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【多选题】
曲线轨距加宽应在整个缓和曲线内递减,递减率一般不大于___。
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曲线地段,未被平衡欠超高,一般应不大于___。
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无缝线路在进行维修作业的地段,起道前应先___。
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无缝线路依处理钢轨___方式不同,分温度应力式和放散温度应力式两种。
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无缝线路钢轨温度的升高或下降的温度变化值影响钢轨内部的___。
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C. 剪应力
D. 剪切应力
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接头阻力由钢轨与接头夹板之间的摩擦阻力和螺栓___提供。
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下列不属于无缝线路特点的为___。
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温度应力式无缝线路的温度应力是靠___来解决的。
A. 自动放散
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【多选题】
曲线轨距加宽递减如无缓和曲线,则在___。
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D. 直线上递减,递减率一般不大于2‰
【多选题】
当350m>R≥300m时,轨距加宽___。
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半径为___及以下的曲线和道岔导曲线,亦可安装轨距杆和轨撑两种加强设备。
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B. 300m
C. 350m
D. 500m
【多选题】
库内线列车运行速度控制在___以下。
A. 3Km/h
B. 4Km/h
C. 5Km/h
D. 6Km/h
【多选题】
轨道上个别插人短轨时,车辆段场线不得小于___。
A. 4.5m
B. 6m
C. 7m
D. 12.5m
【多选题】
螺旋道钉锚固时的温度宜保持在___以上。
A. 0℃
B. 10℃
C. 15℃
D. 22.5℃
【多选题】
无缝线路旧钢轨应切割成不大于___的短轨,以便于运输。
A. 6m
B. 7m
C. 12.5m
D. 25m
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